I had been implementing 16 Bit TIFF in my workflow whenever possible.
But recently I did some tests, comparing 16 bit version and 8 bit version from one same P45 raw file. (from CaptureOne DB, Adobe 1998, ISO 50, IIQ Large, no exposure/contrast/saturation adjustment and no sharpening in C1)
In photioshop , both 16b and 8b images were adjusted by a same very steep curves.
Although their hisograms are definitely different, the difference in the actual images is so subtle, that it only become barely visible when zoomed beyond 200%.
Is the smoother gradient promised in 16 Bit TIFF overcomed by the CCD noise?
Is it is really worth using 16 Bit TIFF? 16b TIFF heavily slows down photoshop, (especially in PC systems, which have 2GB RAM limit for photoshop)